function ProductVote(pro_id)
{
   var CookieValue =getCookie(pro_id);
    if(CookieValue == null)
   {
      
      setCookie(pro_id,"1");
	  return true;
   }
   else
   {
      alert("不能重复操作!");
	  return false;
   }
    
}
function setCookie(name,value)
{
   var exp = new Date();
   exp.setTime(exp.getTime() + 24*60*60*1000);//毫秒
   document.cookie = name + "="+escape(value)+";expires="+exp.toGMTString();
}
function getCookie(name)
{
   var arr,reg=new RegExp("(^|)"+name+"=([^;]*)(;|$)");
   if(arr=document.cookie.match(reg)) 
     return unescape(arr[2]);
   else
     return null;
}
function delCookie(name)
{
   var exp = new Date();
   exp.setTime(exp.getTime()-1);
   var cval=getCookie(name);
   if(cval!=null)
     document.cookie=name+"="+cval+";expires="+exp.toGMTString();
}

